THE ADDEE. 



99 



Tongue and windpipe. — As in the ring snake, 

 the tongue is provided with a strong muscular sheath, 

 and is deeply bifid. It is not often that a photo- 

 graph sufficiently accurately focussed can be obtained 



Note — 



Fig. 21.— Adder (26i inches). 



1. Bilid tongue. 



2. Head plates. 



?>. Arrangement of scales. 

 1. Markings. 



to show this distinctly, but it is well seen in the view 

 shown above — a large adder 26i inches long, captured 

 on the Kentchurch estate. This tongue, though an 

 object of terror to country-folk, is of course only used 



